<template>
    <div class="upload-container">
        <el-button
            :style="{background:color,borderColor:color}"
            icon="el-icon-upload"
            size="mini"
            type="primary"
            @click=" dialogVisible=true"
        >上传图片
        </el-button>
        <el-dialog :visible.sync="dialogVisible">
            <el-upload
                :multiple="true"
                :file-list="fileList"
                :show-file-list="true"
                :on-remove="handleRemove"
                :on-success="handleSuccess"
                :before-upload="beforeUpload"
                class="editor-slide-upload"
                action
                :http-request="handleUpload"
                list-type="picture-card"
            >
                <el-button
                    size="small"
                    type="primary"
                >点击上传</el-button>
            </el-upload>
            <el-button @click="dialogVisible = false">取 消</el-button>
            <el-button
                type="primary"
                @click="handleSubmit"
            >确 定</el-button>
        </el-dialog>
    </div>
</template>

<script>
import { uploadImage } from '@/api/goods'

export default {
    name: 'EditorSlideUpload',
    props: {
        color: {
            type: String,
            default: '#1890ff'
        },
        domain: {
            type: String,
            default: ''
        },
        businessNo: {
            type: String,
            default: ''
        },
        businessType: {
            type: String,
            default: ''
        }
    },
    data() {
        return {
            dialogVisible: false,
            listObj: {},
            fileList: []
        }
    },
    methods: {
        checkAllSuccess() {
            return Object.keys(this.listObj).every(
                item => this.listObj[item].hasSuccess
            )
        },
        handleSubmit() {
            const arr = Object.keys(this.listObj).map(v => this.listObj[v])
            if (!this.checkAllSuccess()) {
                this.$message(
                    '请等待所有图片上传成功 或 出现了网络问题，请刷新页面重新上传！'
                )
                return
            }
            this.$emit('successCBK', arr)
            this.listObj = {}
            this.fileList = []
            this.dialogVisible = false
        },
        handleSuccess(response, file) {
            const uid = file.uid
            const objKeyArr = Object.keys(this.listObj)
            for (let i = 0, len = objKeyArr.length; i < len; i++) {
                if (this.listObj[objKeyArr[i]].uid === uid) {
                    this.listObj[objKeyArr[i]].url = response.files.file
                    this.listObj[objKeyArr[i]].hasSuccess = true
                    return
                }
            }
        },
        handleRemove(file) {
            const uid = file.uid
            const objKeyArr = Object.keys(this.listObj)
            for (let i = 0, len = objKeyArr.length; i < len; i++) {
                if (this.listObj[objKeyArr[i]].uid === uid) {
                    delete this.listObj[objKeyArr[i]]
                    return
                }
            }
        },
        beforeUpload(file) {
            const _self = this
            const _URL = window.URL || window.webkitURL
            const fileName = file.uid
            this.listObj[fileName] = {}
            return new Promise((resolve, reject) => {
                const img = new Image()
                img.src = _URL.createObjectURL(file)
                img.onload = function() {
                    _self.listObj[fileName] = {
                        hasSuccess: false,
                        uid: file.uid,
                        width: this.width,
                        height: this.height
                    }
                }
                resolve(true)
            })
        },
        handleUpload(item) {
            const fileObj = item.file
            // FormData 对象
            const form = new FormData()
            form.append('file', fileObj)
            form.append('domain', this.domain)
            form.append('businessNo', this.businessNo)
            form.append('businessType', this.businessType)
            form.append('file', fileObj)
            uploadImage(form).then(response => {
                console.log(response)
                this.$message.success('上传成功')
                this.handleSuccess(response, fileObj)
            })
        }
    }
}
</script>

<style rel="stylesheet/scss" lang="scss" scoped>
.editor-slide-upload {
    margin-bottom: 20px;
    /deep/ .el-upload--picture-card {
        width: 100%;
    }
}
</style>
